Shanxi Provincial Bureau of Quality Supervision announced that the results of the water meter spot check “Jiajie Brand” failed

[China Instrument Network Instrument Industry] On January 18, 2017, the Shanxi Provincial Bureau of Quality and Technical Supervision announced the results of water meter product quality supervision and spot checks. The spot checks involved 19 batches of products from 14 production and distribution units in Shanxi Province. After inspection, 18 batches were qualified and 1 batch failed.

This time the focus of the water pressure loss test, static pressure test, the basic indication error of the three projects were tested. A batch of LXS-15E "Jiejie" cold water meter (2016.4) produced by Zhejiang Ningbo Jiajie Water Meter Co., Ltd. was found to have failed the indication error.

(Original title: Shanxi Bureau of Quality Supervision sampled 19 batches of unqualified water meter products)

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Tert-Butyl peroxybenzoate (TBPB) a chemical compound from the group of peresters. It is often used as a radical initiator in polymerization reactions, such as the production of LDPE from ethylene, and for crosslinking, such as for unsaturated polyester resins.

TBPB is a low volatility ,high purity,liquid, aromatic peroxuester.it is effective as medium of a broad spectrum of monomers e.g .styrene.ethylenn,acrylics.it is also used to cure (copolymerzation) unsaturated resins .

TBPB is a clear light yellow liquid, which is little soluble in water but well in many organic solvents such as ethanol or phthalate.

As peroxo compound, TBPB contains about 8.16 wt% of active oxygen and has a self accelerating decomposition temperature (SADT) of about 60 °C. The SADT is the lowest temperature at which self-accelerating decomposition in the transport packaging can occur within a week, and which should not be exceeded while storage or transportation.[2] TBPB should therefore be stored between minimum 10 °C (below solidification) and maximum 50 °C. Dilution with a high-boiling solvent increases the SADT. The half-life of TBPB, in which 50% of the peroxy ester is decomposed, is 10 hours at 104 °C, one hour at 124 °C and one minute at 165 °C. Amines, metal ions, strong acids and bases, as well as strong reducing and oxidizing agents accelerate the decomposition of TBPB even in low concentrations.[ However, TBPB is one of the safest peresters or organic peroxides in handling. The main decomposition products of tert-butyl peroxybenzoate are carbon dioxide, acetone, methane, tert-butanol, benzoic acid and benzene.

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